Mortising machine



Nov. 23, 1943. J. H. MANSFIELD MORTISING MACHINE Original Filed Nov. 29, 194i) 2 Sheets-Sheet 1 1943- J. H. MANSFIELD MORTISING MACHINE Original Filed Nov. 29, 1940 2 Sheets-Sheet 2 5 1 f OriginaltapplicationNovemben zali stiogsiial nol 1.; "367,818,;1 Dividediand this a supplemented by one or; more auger bitsurotat-i ably n ountedin the chisel fon performing aisuh-y V stantial ,pa rt of ;the removal Lot/material ling-the auger bitsare rotatabl chiselm'emben; v

associated; with he;

Another object of the:

associated with" a chisel member; said tminibeingt arranged to permit; the auger; bits;- toi operatee very close toleachaotheri unon parallel axesq rwjc A further object Qis:tocprovide':for individual endwisecadjustment of -the bitsjntrelatiomto.

the, chisel memberrto compensate for Wean'and for the grinding; back, of a the cuttingxedges of the chisel whenitgis sharpened; l

n It is also an objectiof the invention to orovide" clutch meansifor connecting-theaiindividual auger.

bits With the ;corresponding: drive spindles, to+

gether with ;means for engaging oxifldisengaging;

all the gclutches,simultaneously particularly in r connection with .the \endwise adjustment 50f: the

c Otherobjects and advantagesiwill appear from; the following description taken in connection withthe;accompanyingdrawings;ii -which:

Figllnis asiderelevation Ofga mortising ma chineof the" type toiwhich this inventionrappliestz Fig.v 2'is afront elevationvpartly in'section z showing the tool headand mortising chiseLssec-i tion being taken substantiallyi at1the plane-of the axes (if the augenbitsand-their drive shafts.

as indicatediat line 3-3 ion Fig;12; l

Fig; 4 is'a horizontal detail section taken indicated; at line 4- -dron Fig.; 3..

atqllne 75-5 on Fig, 3.

.Fi g. 6 is atop plan viewoiytheheadshown in;

Fiss- Zand as i i daaftll nerfi 1 53. i Fig.- 7- is an-;en1arged;vertica1 section at: the

same planeas Fig. 3, showing one of theauger, bits and adjacent portions ofthechisel rnemn in. t Fig 8 is' atransverse section taken asindicated atli'ne 8- 8 011mg. 2. a

Limbau h we. shqwi i th-qrwmi iaa 55;

. V s V Q 1 f {This invention relatesflto znultinlegspindlema T chines and particularly-to montising-machines-of the type in; which-a hollow, chisel membjery is 0 prov a driving; train ,for; a plurality 0f ;augeirlbits thus MOIEIIS ING MAGHI NEfv alc snocnr rmnlp Indication- October: n a;

the invention; I-do not' intend tolimit the 'in- .vention to the'particular formshown, but aim to-.-;cov er all modificationsand alternativel con-l structions coming withinthe-scope of theclaims. The morti sing machine: illustrated I generally in Fig. 1' includes h an upright-flame l havingv ,a

. V Work;suppdrftingtalc-lel and ahead 3 slidably i mounted the frame for movementltoward and I igom;- the table, ,By means,gfl suitableqlinkage,

:nct shown; hodsed Within theframe l, a treadle t :isiarranged to control this: vertical 1movement" oi he he d 3;fo1? feeding' the chisel member} m tise nereinz; It may he gunderstood thatthe s in sing ;tool;is;of thetype which 'includes; one -er'mq e lee b tsarotata y sa g d w hin-Plane:

' qt ool fort-removing a substantial portion of the material ingfthlet process {of forrnin'gfa mortise;

=Thesel;.bitsgare: clriven h-y i-means of at suitable e k-piece; indicated {at to; forma electric motor enclosed within (a housingvl which surmounts the head.;3,and is connected to move withgit throughout its range of vertical adjustmer t in the f rame;,I.-;;

The-head? is shownlon a larger scale in Figs.

Wlthfa plurality of auger bits it] which, min

vpartic ilar tool illustrated, are four in number and are rotatably-mounted Within parallel bores um the loody of thechiseljrnember 5." I l Each of theauger hits-includes a pointed center i Z and a single spurHor-cutter. i3 atits lower end, and-theend portion! which carries the centerlli. and cutter: I3 is of slightly larger diam- 3 eter than the bore 1| andis tapered back toits Fig. 3 is a vertical gsectionp-taken:principally connection with the helically grooved body por-- tion of the bitinzwhich a helical groove 15 is formedforconveying the-chips upwardly irom l. 4' the cutting-rend- The lowen end of the bore H Fig.5 is a; detail section takenqas indicai'ed:

is slightly. flaredat E6: to accommodate the tapered-end portion l 0fth;blt-,"b1lt suitable running clearance is tprovidedwbetween these;

tapered parts tandalso-between the mainahodysof the bit-andtheborell. I a

slot :1 is formedinthefront wall or fthe:

,chisel member 5 opposite'each of; the/bores It;

and similar slots [8 are formed in the-back wall;

herein i describe in detail; a single foi'in; of

a V the conveyor feed of the groove l5, andeventuend portion ofthe helical" groove or"thjecy 1in fidrical shank E9 of the bit so as'to-seriouslyim pair its operation. To prevent thisganbppOSitely';

helical groove 29;, which need notconsist'ofmore ij than a, single turn, isiformed adjoining the'groove [Eat the upper end so as to operate a's-a conf; I

' veyor, tendingto; feed, downwardly; ny chips which are carried .to this height-by thegroove' 15} jbe discharged from the interior of the chisel. Preferably, to avoid unduly'weakening the chisel body through too great'a portion of its length, the openings IT and H! are verticallyf offset with respect to each other, the openings l8 extending 5 lower in the chisel bo y than the openings I 1, and the openings If! extending higher thanthe openings l8,"as clearly seen inFig. 7. V But in'spite'of the provisionof the discharge 5 slotsl'i and I8 there is a; tendency: for someof'lo the chips to continue upwardly in response ,;to

ally'this" material might pa'clg a'nd clo g the up'p and ,since' the opening l l eiiten'ds opposite the lower en'd of the groove 2e wherelit connects with the groove 15; the chip's'fe'ed'ing downward along "thegreove z fi, and thusfeeding upward 'alonglthe 5 I groove 15; are easily discharged throughQthe r o nin'g il'as they-tendto aecuhzniljate at the junction of-ithe; two helical-passages; "This featiiie is" more particularly the subject. matter 'of g my 'aforesaid copending-iipplicationi Serial"ZNo.

' jas se n in'FigQ 3," -the shank of; ach" bi includes-areduced' and -threaded terminal ipor I tion 2! at its 'up'perend and'this partis screwed V intol-the threadedt re 22ers drive -spindlef23 ,35; jdurnale'din, the headfiio'ffthe machineFBelow the"'thre'adedpoI tionJE theendof thespindle is counterbored at 241mm; fo'rnred;.with fclutch' a l teeth "25 for engag enfent with similar teeth 25 on' theupper} end of a' clutch collar 21 nioiinted rinkalignment -withthe"spind1e shaft 23, The; collar 2'i isprovided -with akey or splin'e'fil which slidablyln gages in agroove' or keyslot zfl in the shank; IQ of the auger-'bi'tJD'fordriving it 7' when-the collar 21- is positioned with'it's clutch V teeth-in engagement 'withthe toothed lower end fi 've w e-- a As seen in Fig. 2; aseparate fcllitchj collar 21 provided for e'aoh 'of the? auger bits-'13,; These clutch collarsfare' normally held: in driving frelation to the spindles 23 by means 'of Iaf "slide 29 guided for limited vertical inovem'ent'ih the head a 3 upon-sli'de'plates 30'whichare securedjto the 7 front face of. the head by; screws '3 lj, and extend "into engagement with vertical grooves inoppo'sit'e 5'5 sides of the slide neinber ZQ. ,This member 29 is bored to accommodate th shanks Q9 of the auger bitsfand-is counter-bored at 32 to engage the lowerends of the clutch collars 21. The slide rests' upon a'rock shaft '33 extending 'acrbss'the head 3; and said shaft is-formed with a flatface 34 at one side; so that when the shaft is turned, through an angle of 99 degrees by means of its a handle 3-3 it acts as a cam to lower the slide 29 V 7 7 onto the fiat face 34, thus loweringtheclutch 'co11ars 2T out of driving connection with the toothedlower endsiofthe spindles '23l V Mith'theslide ZS'and the clutch collars 27thus lowered it is possibleto rotate each of the auger H bits Ifi'for adjustingit endvv'isefby means ofits threaded connection at 2 {with its" spindle 23;;so asto bring'the tapered end portion l4 'into cor 2,334,830 a IL-1 ance; and-with its cutting spur l3 properly rlated to the lower end ofthe chisel body 5. It will be understood that the lower edges and corners ofithewbody 5 aresharpened to cut away I the portions ofthe mortise which are not removed by -the angers themselves, and that re.- 1 I sharpening of these edgies'willalter their relation 1 "tothe' lower ends of the augers'so as to require readjustment of the latter .by means of their: ---threaded connections at 21' with the drive spindles v 23;; Nil-hen each of the augers hasbeen satisfacv. tgrily adjusted its clutch collar 2'I'is turned 'a :driving fteethwififiinto registration between the v teeth 25 of the spindle, andthe cam shaftw33 is, v dturnedbaclctb,thepositionillustrated in Fig.fj3 forielevating th -slide' 23 andrtll ls liftingthe;

clutch collars into driving engagement with the spindles. n

'It' may" be un erstood that each of auger b tfi pur 3, posiitionedf'as h0 e d a eter-111s gsiibstantially Y Tequ'aleitol-the-thickness of h l e'mber 'fi S*nieasured -between its=front and backouter faces; "And as indicated inFi g. 2,=the"a'uger'bits lfliare'monnted inthe 'chiselineinberi withtheir 1 I ai'ies -as cl'ose' together as possible so that the a lower lend' p'ortions L I 4 or. adjacentbits run very? close together and their cutters I 3 jremove a,large proportiomof 'thematerial to "be cut-away'informing th'e m'ortisag {In-order that the ang rs; Y

Y lfl anditheirsdrive spindles]23 may be grouped: .soiclosely a gear -trainY for drivingthe spindles; 23is arrangedas shown'in Fig.-4. From*the housing 'lasdrive shaft 35 extends into the head -3','fand within :aLchaimber 3giormed-j Within the} f headi3Es'aid shaft carries a gea'r -36'me'shing"with z apairof."id1er-gears-f'31 journaled within said chamber: Eachfiof the spindles i 3 carrie's' a gear; v 38"Ir'ieshing"withflonefoflthe idlers 31; but the faces of" the' gears 38. arefslig'htly' less thanhali' f;'the.-:width of the races i r idlers 31, which pep; mit'sonegeara38jto mesh'with the upper portionf of the idler 31 while-the adjacentgean 38 meshes" with athewlower portion of the. face of the same and'bothgears 38 driven by each'idler 37 rotate in thesame direction; hence; all fourof the spindlesfz-zfi are driven in thes'ame directionwhile the staggered arrangementoftheindrive'gears 38'1permits'f their axes to be located very close togeth'er-and'still allows the pinionsp38 to be et-a substantial size::which?is adequate to the load to be transmitted; and is also conveniently propor tioned for economical'production.

Near'the upper end each spindle 23 is provided with'ar flange Mrunning between bearings 4| of suitable bearingmetal'iorsuppor-ting the spindle Vertically" in'fposition, and the "working thrust against the spindleiis arranged to be taken by' I the'baIIJZ disposed between: the upper end 0f w the spindle and the plug 43; having a beveled j. upper face'; Ml which is'enga'ge'd 'by the conical 'efia msbr an adjusting screWJG by which't he' positioniof the thrustlbearing maybe accurately adjacentthe lowerend of said boreand the'auger spindle respectively, one member of each pair the part with which it is rotatably connected and through a distance greater than that required for disengagement of the clutch;

2. In a mortising machine, a chisel member with an auger bit mounted for rotation within a bore in the chisel, the chisel having cutting edges spindle, and a cooperating clutch collar slidable being axially slidable for disengagement from the other without separation of the threaded connection between the bit and spindle, andmeans operable to shift all said slidable clutchmembers simultaneously;

5. In a drilling machine, a drilling tool', a drive spindle'aligned therewith, the lower end of the spindle and the upper end or the tool being threaded for interengagement to permit endwise adjustment of the tool, a clutch member on the axially on'the tool into and out of engagement with the spindle clutch member but splined to the tool to form a drivelconnection from the spindle thereto.

adjacent the lower end of said bore and the auger having a cutter at its lower end tocooperate with said cutting edgesof the chiseLa drive spindle aligned with the auger bit, the lower endof the spindle and the upper end of the bit being threaded for interengagement to permit endwise adjustment of the bit for correctly positioning its outter in relation to the cutting edges'of the chisel, together with a clutch member on the spindle and a cooperating clutch collar slidable axially on the'bit into and out of engagement with the' spindle clutch member but splined, to the bit to form a drive connection from the spindle thereto;

3, In a mortising machine, a chisel member with a plurality of auger bitsmounted for rotation within parallel bores in the chisel, said chisel having cutting edges adjacent the lower ends of said bores and the augers having cutters at their lower ends to cooperate with saidcutting edges of the chisel, a plurality of drive spindles aligned with the auger bits respectively, means connecting each bit to one of the spindles and adjustable to shift the bit endwise in the. chisel bore for correctly positioning its cutter in'relation to the 6. In a multiple spindle machine, a plurality of drilling tools positioned for rotation upon parallel axes, a plurality otdrive spindles aligned with the tools respectively, means connecting each tool to one of the spindles and adjustable to shift the tool endwise with respect to the spindle, and disengageable clutch means providing a driving connection between each spindle and its tool together with means operable to shift all the clutches simultaneously.

7. In a multiple spindle machine, a plurality of tools positioned for rotation upon parallel axes,

a plurality of drive spindles aligned with the tools;

respectively, a clutch member on each spindle,

and a cooperating clutch collar slidable axially on each tool into and out of engagement with the spindle clutch member but splined to the tool to form a driving connection on the spindle thereto, together with a transversely extending slide member engaging a transverse shoulder of each of said a clutch collars and guided for movement parallel to their axes of rotation, and means for moving i said slide member to engage or disengage the cutting edges of the chisel, and disengageable clutch means providing a driving connection between each spindle and its bit, together with means operable to shift all the clutches simultaneously. I f v 4. In a mortising machine, a chisel member witha plurality of auger bits mounted for rotation within parallel bores in the chisel, said.

chisel having cutting edges adjacent the lower ends of said bores and the augers having cutters clutch collar simultaneously.

, 8. In a drilling machine, in combination, a

drilling tool comprising a first part, a drive spindle aligned therewith and comprising a second part, means connecting thetool to the spindle, said means being adjustable to shift the tool endwise with respect to the spindle for varying the distance of its cutting end from the end of the spindle, inter engageable clutch members on the j tool and spindle respectively, one of said-members at their lower ends to cooperate with said cutting edges of the chisel, a plurality of drive spindles aligned with the auger bits respectively, each spindle and its bit having a threaded engagement permitting endwise adjustment of the spindle for correctly'positioning its cutter in relation to the cutting edges of the chisel, and a pair ofinterengageable clutch members on each bit and member.

being located on one of said parts so that it rotates therewith, and means forming a splined connection between the other of said clutch members and the other of said parts so that it rotates therewith and is slidable longitudinallythereof into and out of engagement with the first clutch JUDSON H. MANSFIEID., 

